载体中元素电负性对稀土催化剂定向性的影响  

Effect of Element Electronegativity in Supporters on the Selectivity of Supported Rare Earth Catalysts

作　　者：单成基[1] 张成林[1] 

机构地区：[1]中国科学院长春应用化学研究所,长春130022

出　　处：《应用化学》2001年第6期481-483,共3页Chinese Journal of Applied Chemistry

基　　金：中国科学院院长基金资助项目 (0 3 15 96)

摘　　要：Supported rare earth catalysts were made from Nd（O-i-Pr）3 and the halides, especially chlorides of the ⅠA and ⅡA groups, used as catalyst supporters, for studying the relationship between the composition of supporters and the selectivity of supported rare earth catalysts. It was found that the electronegativity of the ⅠA or ⅡA elements showed an obvious effect on the selectivity of the supported catalysts, i.e. the selectivity of the supported catalyst was increased with the increase in their electronegativity, as in the case of supported Ti-catalyst .This rule was also held as the supporters are magnesium halides.Supported rare earth catalysts were made from Nd(O-i-Pr)_3 and the halides, especially chlorides of the ⅠA and ⅡA groups, used as catalyst supporters, for studying the relationship between the composition of supporters and the selectivity of supported rare earth catalysts. It was found that the electronegativity of the ⅠA or ⅡA elements showed an obvious effect on the selectivity of the supported catalysts, i.e. the selectivity of the supported catalyst was increased with the increase in their electronegativity, as in the case of supported Ti-catalyst .This rule was also held as the supporters are magnesium halides.

关 键 词：丁二烯 定向聚合 载体 稀土 ZIEGLER-NATTA催化剂 选择性 电负性 活性中心 

分 类 号：O632.12[理学—高分子化学] O643.361[理学—化学]